package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrdersMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Indexed;
import org.springframework.stereotype.Service;
import springfox.bean.validators.plugins.parameter.ExpandedParameterNotNullAnnotationPlugin;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    OrdersMapper ordersMapper;
    @Autowired
    UserMapper  userMapper;
    @Autowired
    private ExpandedParameterNotNullAnnotationPlugin expanderNotNull;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 统计指代日期范围营业额统计
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //此集合用于存储与begin到end范围内的每天日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        //此集合用于存储每天营业额
        List<Double> turnoverList=new ArrayList<>();
        //日期计算指定日期的后一天日期
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //select sum(amount) from order where order_time> ? and order_time < ? and status = 5
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",5);
            Double turnover=ordersMapper.sumByMap(map);
            turnover=turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 统计指定日期范围用户统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //用于存储begin到end日期范围内的每天日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //计算指定日期的后一天日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存储每天的新增用户数量  select count(id) from user where creat_time < ? and create_time > ?
        List<Integer> newUserList=new ArrayList<>();
        //存储每天的总用户数量    select count(id) from user where create_time < ?
        List<Integer> totalUserList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("end",endTime);
            Integer newUser = userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer totalUser = userMapper.countByMap(map);
            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(newUserList,","))
                .newUserList(StringUtils.join(totalUserList,","))
                .build();
    }


    /**
     * 统计指定日期范围订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        //用于存储begin到end日期范围内的每天日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //计算指定日期的后一天日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //用户存储每天的订单数量     select count(id) from orders order_time < ? adn order_time > ?
        List<Integer> orderCountList=new ArrayList<>();
        //用来存储每天的有效订单数量  select count(id) from orders order_time < ? adn order_time > ? and status=5
        List<Integer> validOrderCountList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            Integer orderCount=getOrderCount(beginTime,endTime,null);
            Integer validOrderCount=getOrderCount(beginTime,endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //订单总数
        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();
        //有效订单数
        Integer validOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate=0.0;
        if(validOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据指定时间统计指定状态的订单
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
        Map map=new HashMap<>();
        map.put("begin",beginTime);
        map.put("end",endTime);
        map.put("status",status);
        return ordersMapper.countByMap(map);
    }

    /**
     * 根据指定时间范围TOP10的商品
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getsalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList=ordersMapper.getSalesTop10(beginTime,endTime);
        List<String> nameList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }

    /**
     * 导出近30天的运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response){
            LocalDate begin = LocalDate.now().minusDays(30);
            LocalDate end = LocalDate.now().minusDays(1);
            //查询概览运营数据，提供给Excel模板文件
            BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
            InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet1 = excel.getSheet("Sheet1");
            sheet1.getRow(1).getCell(1).setCellValue(begin+"至"+end);
            //获得第4行
            XSSFRow row3 = sheet1.getRow(3);
            //获取单元格
            row3.getCell(2).setCellValue(businessData.getTurnover());
            row3.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row3.getCell(6).setCellValue(businessData.getNewUsers());
            XSSFRow row4 = sheet1.getRow(4);
            row4.getCell(2).setCellValue(businessData.getValidOrderCount());
            row4.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                XSSFRow row = sheet1.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            //关闭资源
            excel.close();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
